Energy storage properties of NaNbO3-CaZrO3 ceramics with coexistence of ferroelectric and antiferroelectric phases
Energy storage properties of NaNbO3-CaZrO3 ceramics with coexistence of ferroelectric and antiferroelectric phases
复制标题
DOI：
10.1016/j.jeurceramsoc.2018.07.029
复制
发表时间：
2018-12
影响因子：
5.7
通讯作者：
Zhiyong Liu;Jinshan Lu;Yu-qing Mao;Pengrong Ren;H. Fan
中科院分区：
文献类型：
--
作者：
Zhiyong Liu;Jinshan Lu;Yu-qing Mao;Pengrong Ren;H. Fan
反铁电材料具有饱和极化大、剩余极化小、击穿强度适中等优点，在现代大功率电力系统中受到越来越多的关注。在这里我们证明了在NaNbO_3陶瓷中掺入CaZrO_3可以在室温下稳定NaNbO_3-CaZrO_3固溶体中的反铁电性。研究了相组成和微观结构对NaNbO_3-CaZrO_3陶瓷的介电性能、电击穿强度和储能性能的影响。X射线衍射和透射电子显微镜分析证实了NaNbO_3-CaZrO_3中铁电和反铁电相共存。随着CaZrO_3含量的增加，晶粒尺寸减小，介电击穿强度提高。因此，在NaNbO_3-0.04CaZrO_3陶瓷中获得了0.55 J/cm~3的高能量密度和63%的效率。这些无铅NaNbO_3-CaZrO_3反铁电体具有良好的电能储存性能，可用于大功率储能器件。
Anti-ferroelectric materials with large saturated polarization, small remnant polarization, and moderate breakdown strength are receiving increasing attention for modern high-power electrical systems. Here we demonstrated that by incorporating CaZrO3into NaNbO3ceramics, the antiferroelectricity in NaNbO3-CaZrO3solid solutions could be stabilized at room temperature. The effects of phase constitution and microstructure on the dielectric properties, electrical breakdown strength, and energy storage properties of the NaNbO3-CaZrO3ceramics were investigated. Ferroelectric and antiferroelectric phase coexistence in the NaNbO3-CaZrO3was confirmed by XRD and TEM analyses. With increasing CaZrO3content, the grain size was reduced, and the dielectric breakdown strength was improved. Therefore, a high energy density of 0.55 J/cm3and efficiency of 63% was obtained in the NaNbO3-0.04CaZrO3ceramics. These lead-free NaNbO3-CaZrO3antiferroelectrics with good electrical energy storage can be exploited for high-power storage devices.